<template>
        <div>
    生命周期钩子函数
    <button @click="count++">点击</button>
    <p>{{ count++ }}</p >
        </div>
    </template>
    <script setup>
    import {onMounted,onBeforeUpdate,onUnmounted} from 'vue'
    onMounted(() => {
        console.log('组件挂载完成');
    })
    onBeforeUpdate(() => {
        console.log('组件更新之前');
    })
    onUnmounted(() => {
        console.log('组件卸载之前');
    })
    </script>
    <style scoped>
    </style>